Occultation event with (5041) Theotes, event index number 840
Regions able to see the event: Australia
Geocentric closest approach at 2025/03/21 17:52:05 UTC
J2000 position of star is 11:01:36.6 +16:22:03
Equinox of date position of star is 11:02:56.6 +16:13:53
Star is 103 degrees from the moon. Moon is 57% illuminated.
Stellar brightness G=16.5, apparent brightess of occulting body is G=15.6
Use an exposure time of 1.00 seconds with the standard RECON-QHY system.
Expected flux drop is 68% with SNR of 3.0 per integration
Apparent velocity is 15.1 km/sec on the sky relative to the star, or, 18.3 arcsec/hr.
The recommended exposure time corresponds to 15.1 km per image.
The 1-sigma error in the time of the event is 3.6 seconds.
The 1-sigma cross-track error in the shadow position is 31.3 km.
The sky-plane scale is 2975.6 km/arcsec.
Diameter estimates:
40.5 km assuming a 5% albedo, aximum of 2.7 sec for a central chord
16.6 km assuming a 30% albedo, maximum of 1.1 sec for a central chord
Cross-track diameter of 40.5 km used for deployment plan.
Star training set for 5041_Theotes, (2025/03/21 17:52UT) Object RA Dec mag sep mel Regulus 10:09:42.7 +11:50:35 1.3 13.63 113 68Del Leo 11:15:26.8 +20:23:06 2.6 5.10 103 70The Leo 11:15:33.7 +15:17:29 3.3 3.18 100 PPM 127939 11:05:24.9 +16:07:13 8.5 0.60 103 PPM 127890 11:01:08.3 +16:15:06 9.0 0.43 104 PPM 127929 11:04:07.2 +15:57:21 10.2 0.39 103 5041_Theotes 11:02:56.6 +16:13:53 15.6 103 Positions are for equinox of date
Star training set for 5041_Theotes, (2025/03/21 17:52UT) Object RA Dec mag sep mel Regulus 10:08:21.9 +11:58:02 1.3 13.63 113 68Del Leo 11:14:06.7 +20:31:22 2.6 5.10 103 70The Leo 11:14:14.3 +15:25:44 3.3 3.18 100 PPM 127939 11:04:05.0 +16:15:24 8.5 0.60 103 PPM 127890 10:59:48.2 +16:23:14 9.0 0.43 104 PPM 127929 11:02:47.2 +16:05:31 10.2 0.39 103 5041_Theotes 11:01:36.6 +16:22:03 15.6 103 Positions are for J2000